Strange switch on ][+ keyboard

[John <john8520@gmail.com>]

Hi all,
I recently joined the Apple II world from acquiring an Apple //e
extended and and Apple ][plus, as well as a Monitor II, Duodisk, two
Disk ][s, an imagewriter, and a plethora of software of manuals for
free off my local craigslist.

The //e has some serious problems, when it boots it gives me a screen
where two rows are @ symbols, two rows are 'gray' blocks, the next two
are @s, then blocks, etc etc. The ][plus on the other hand boots up
fine, unless the language card (16k RAM and a new special ROM) is in,
then it drops me to the monitor. So I've removed the language board,
and moved one of its RAM chips to the spot where the cable was once
connected to the logicboard so that it works fine and is stable.

Once I had all that done, I realized that the keyboard is in terrible
shape, you really had to mash the keys to get them to register. So, I
opened the machine up, took out and washed the mainboard to get the
dust/grime/etc off. While the mainboard was drying, I opened up the
keyboard to take a look. Sure enough, the little gold pads were
covered in some sort of ickyness. A nice half hour soak paired with a
bit of fingernail scraping and its good as new. When I was putting the
board back together, however, I noticed a switch on the keyboard's
encoder board. Its got two settings, CNTL and RESET, what are these
for? Right now its set to CNTL, but I'm not sure if I should switch it
or not. Thoughts?

John

PS - Contrary to what many people think, washing logicboards in warm
soapy water, then rinsing them with distilled water *does not* kill
them! (Unless you power on the system before it's totally dry, I
usually let it hang dry for 30 minutes, then I hit it with a hairdryer
on low for a while, then let it sit overnight) It in fact removes many
problems from the board, such as oxidation on chip leads, capacitor
goop that can cause shorts, and dust that can gum up fans (not much of
a problem for a ][+ there, heh). I brought my old Macintosh II back to
life by washing the mainboard, and it brought one of mt LCIIIs back
from alot of spastic and seemingly random crashes. And if it doesn't
work, at least you have a dead board that looks pretty!